Engine



Patented Jan. 13, 1931 UNITED STATES FRANCIS A. J'IMERSON, OF ATHENS, PENNSYLVANIA, ASSIGNOR TOINGERSOLL-RAND COMPANY, OF JERSEY CITY, NEW J'ERSEYIA CORPORATION'OF NEW JERSEY ENGINE Application flied October 19, 1927; Serial No. 227,190.

This invention relates to engines of the reciprocating piston type and more particularly to a cylindrical cross head guide for a double acting piston engine.

One object of the invention is to enable a connecting rod to be, quickly disconnected from the cross-head.

Another object is to provide a large bearing area for the cross head.

Other objects and advantages of the invention will be in part apparent and in part pointed out hereinafter.

In the drawings in which similar reference characters refer to similar parts,

Figure 1 is a longitudinal section through a portion of an engine or motor provided with a cross head'guide constructed in accordance with the practice of the invention, and

ably mounted a crank shaft B adapted to be actuated by the engine andhaving suitable anti-friction bearings C. i

w The engines includes a pair of cylinders D which may be cast integrally in a single block E and within which a pair of pistons F are adapted to reciprocate. The engine is preferably double acting, the pistons F being alternately exposed to compressed air or other suitable motive fluid on both front and rearward faces. One end of each cylinder D is closed by means of a head formed integrally with a cross head guide G having a stufiing box H extending into the cylinder and containing suitable packing material J compressed by a gland K. A piston rod L suitably attached as by means of a nut O to the piston F is formed with an integral cross head P which is cylindrical in form and adapted to slide in a cylindrical bore Q, of the cross head guide G.

The cross head P is provided with a transverse bore R into which is inserted a pin S v In practice it often becomes desirableto remove the connecting rod T from the cross head P- withouttaking the entire engine a art and tothis end means 'areprovided by w ich the pin S may be removed by merely disconnecting the crank shaft of the connecting rod from the crank shaft B. Forthis purpose the pin S is slidably mounted in the aperture R of the cross head 1? and apertures V are provided in the cross head guide G through which the pin S is adaptedto be passed, In order that the pin S inay normally stay in position, the apertures V are located preferablg transversely to the plane in which the pin normally-lies. In order, therefore, to remove the pin S, it is merely necessary to rotate the cross head P through an angle, preferably 90. a 1 Access to the interior. of the casingto disconnect the crankend of the connecting rod To is providedby a cover W suitably boltedzto the casingand covering an aperture X. Preferably the apertures V are directed so that the ins S may vbe removed in the direction of t e aperture X. I

It is thought that the above description indicates the method ofremoving the connecting rod T when such is necessary, it being noted that with the coverplate W' re-t.

moved, the connecting rod T is disconnected from the crankshaft "B by removing the cap screw .Y whereupon the connecting rod T- is rotated and the pin S isbrought into registry with the apertures V. The pin S 1s readil removable through the apertures V andt e connectingrodT withdrawn and removed through the apertures X. a

This invention is not restrictedto the specific form used for an illustration, but may beapplied to any similar construction where a a reciprocating member is connected to a connecting rod by means of a pin, access to which may be desirable through the walls of the cyllnder. o Although in ,the instance illustrated the pin is held in place by turning the reciprocating member in its bore, other means of retaining the pin in position may be adopted.

In this instance the pistons F are double acting, the cylinders D being provided with suitable ports (not shown) "and a valve (not shown) preferably driven by a counter-shaft Z Thus are accomplished among others the I objects hereinbefore recited.

I claim:

1. A cross head mechanism comprising a cylindrical cross head guide, a cylindrical cross head slidable in said guide and a pin in the cross head adapted to-be attached to a connecting rod, said guide having an aperture extending therethrough transverse to the normal position of said pin, said cross head being rotatable in the guide to align the pin with the aperture to permit removal of said pin without removal of thecross head.

2. In an engine and the like'the'combination of a cylindrical bore and ajreciprocating member therein, acconnecting rod for the re-' ciprocating member, means to pivotally con nect the rod to the reciprocating member, the wall of said cylindrical bore having an opening to permit access to the connecting means.

' 3. In an engine and the like the combination of a cylindrical chamber and a reciprocating member therein, a connecting rod, a pin to connect the rod to the reciprocating member, the wall of the cylindrical chamber having anopening to permit removal ofthe pm. g

4:. In an engine and the like the combination of a cylindrical chamber and a reciproeating member therein, a connecting rod, a wrist pin for connecting the rod to the reciprocating member, the wall of the cylindrical chamber having diametrically opposed openings to permit removal of the wrist pin.

5. In an engine and the like the combination of a cylinder and a piston therein, a connecting rod, a wrist pin for connecting the rod to the pist'on, said cylinder having diametrically opposed apertures in its wall'to permit removal of the Wrist pin. a

6. In an engine and the like the combination of a cylinder and a piston'therein, a connecting rod, a wrist pin for connecting the rod to the piston, and an aperture in the wall of the cylinder to permit access to th'e'wrist pin.

7. In an engine and the like the combination of a cylinder and a piston therein, a connecting rod, a wrist pin for connecting the rod to the piston, and an aperture in the wall of the cylinder to permit access to the wrist pin when the piston occupies a position near bottom center, I

In testimony whereof I have signed this specification.

FRANCIS A. J IMERSON. 

